*This list of cities may not be
complete. The list may contain towns, cities, villages, boroughs, neighborhoods,
townships, ghost towns and other populated places.

If you have information about any
of these unlinked communities, please send
it to us and we will add a page for that community. Some of these places
above may only be neighborhoods or local area names and are not listed with
the census at all or just included in a larger surrounding designated census
area..

San Diego was one of the first 27
original counties in the state when it was created on 18 February 1850. The
county had about 40,000 square miles when it was created, including all of San
Diego, Imperial, Riverside, San Bernardino, and the eastern portion of Inyo
County.

The name of the county is from San
Diego de Alcala after Vizcano's flagship and favorite saint. Though the name
is credited to Spaniard Don Sebastian Vizcano, who came into San Diego Bay on
12 November 1603, explorer Juan Rodriguez Cabrillo actually came 61 years earlier,
naming it San Miguel.

Sizetotal area: 4,225 square miles
65 miles from north to south and 86 miles from east to west.

High temperatures here rarely go
over 80 and low temperatures rarely go under 60 making the San Diego area a
great place to live. These temperatures are generally for the City of San Diego
area. Once you travel to the inland areas of the county the temperatures will
go up during summer and cool off more in winter, but are still generally wonderful!

Location:

San Diego County's southern boundary
is our international border with Mexico Tijuana and Tecate are the two main
border towns on the Mexico side of the border. The western boundary is the Pacific
Ocean. Mission Bay is a prominent geographic feature on the San Diego County
coast. Its eastern border is shared with Imperial County. The northern border
is shared with a small part of Orange County and a much larger length of Riverside
County. Here is a County map
page